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System for treating malodorous gas from sludge

a technology for treating systems and malodorous gas, which is applied in the direction of separation processes, dispersed particle separation, chemical instruments and processes, etc., can solve the problems of affecting the sanitation of the plant area and surrounding areas, affecting the reliability of the adsorber operation, and posing serious safety hazards for field operators, so as to reduce the replacement frequency significantly, ensure the reliability of the adsorber operation, and reduce the cost of energy consumption. to negligible

Active Publication Date: 2021-07-01
ANHUI RESOURCE SAVING & ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present patent proposes a system for treating malodors from sludge. The system uses pressure swing adsorption (PSA) towers for adsorbing malodors and oxidizing them with a catalyst. The two PSA towers work together to ensure a steady operation. The system eliminates the use of energy-consuming equipment and reduces the cost of raw materials replacement. It also improves processing efficiency and reduces equipment size. The technical effects of the patent are reduced malodors volume, improved treatment efficiency, and reduced equipment size.

Problems solved by technology

Due to unorganized emission and its large ratio, malodorous gas is not easy to diffuse and dilute, and will bring an adverse impact for sanitation in the plant area and surrounding areas.
Even when the local concentration is too large, it poses serious safety hazards to the field operators.

Method used

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  • System for treating malodorous gas from sludge

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Experimental program
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Effect test

first embodiment

[0033]In the first embodiment, the collected malodorous gas is compressed to 1.0 MPa (A) by the air compressor, and the second valve K2, the third valve K3 and the sixth valve K6 are closed, and the first valve K1 and the fourth valve K4 and the fifth valve K5 are opened. The malodorous gas to be treated compressed by the air compressor 1 enters the first pressure swing adsorption tower filled with granular activated carbon to be deodorized. And the deodorized gas after being fully adsorbed enters the buffer tank. According to actual production needs, the deodorized gas is discharged to the sludge separation tank and the aerobic aeration tank.

[0034]Specifically, in the present embodiment, when the second pressure swing adsorption tower is switched from the adsorption tower to the desorber, the internal pressure of the second pressure swing adsorption tower reaches 1 atm (A), desorption starts.

[0035]The vacuum device 7 is turned on, which adjusts the internal pressure of the second p...

second embodiment

[0036]In the second embodiment, the collected malodorous gas is compressed to 1.2 MPa (A) by the air compressor 1, and the first valve K1, the fourth valve K4 and the fifth valve K5 are closed, and the second valve K2 and the third valve K3 and the sixth valve K6 are opened. The gas compressed by the air compressor 1 enters the second pressure swing adsorption tower 3 filled with granular activated carbon, and the deodorized gas after being fully adsorbed enters the buffer tank 4. Then the deodorized gas is discharged into the sludge separation tank and the aerobic aeration tank according to actual production needs.

[0037]At the same time, the first pressure swing adsorption tower 2 is in a desorption state. Desorption starts when the internal pressure of the first pressure swing adsorption tower 2 reaches 1 atm (A). The vacuum device is turned on to start to maintain the pressure in the first pressure swing adsorption tower 2 at 0.05 MPa (A). After 3 hours of sufficient desorption, ...

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Abstract

The present application provides a system for treating malodorous gas from sludge, which includes an air compressor, a first pressure swing adsorption tower, a second pressure swing adsorption tower, a buffer tank, a decomposition tank, an exhaust gas scrubber and a vacuum device. The present invention relates to a process for treating malodorous gas from sludge treatment, which includes several steps as follow: compressing the malodorous gas by using an air compressor, and adsorbing by using a pressure swing adsorbent. The air for removing the malodorous component is configured for sludge separation and aerobic aeration in the treatment tank. When the pressure swing adsorbent reaches the design upper limit value, the intake air is stopped, decompression and desorption start, and the enriched malodorous component is sent to catalytic combustion or photocatalytic decomposition, and then the acid gas in the tail gas is neutralized with an alkaline absorbent, and finally discharged to the standard. The treatment system in the present invention has the advantages of low processing cost, reduced malodor treatment volume, complete treatment of malodorous gas, and easy disposal of three wastes.

Description

[0001]This application claims priority to Chinese Patent Application No. 201811139765.8, filed to the Chinese Patent Office on Sep. 28, 2018, entitled “System for treating malodorous gas from sludge”, the entire disclosure of which is incorporated herein by reference.TECHNICAL FIELD OF THE INVENTION[0002]The present invention relates to treatment of gas from sludge, in particular for a system for treating malodorous gas from sludge.BACKGROUND OF THE INVENTION[0003]At present, large-scale urban sewage treatment plants generally use activated sludge process for sewage treatment. After collecting sludge from each pool, they are subjected to anaerobic degradation, filtration, composting, and finally returned to the field or incinerated. The anaerobic degradation, filtration and composting process of sludge will produce malodorous gas. The source of malodor of the gas is generally hydrogen sulfide, volatile mercaptan, volatile sulfur ether, ammonia, volatile organic amine. Due to unorgan...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01D53/053B01D53/04B01D53/14B01D53/18
CPCB01D53/053B01D53/0446B01D53/0423B01D53/1437B01D53/1456B01D2252/10B01D53/18B01D2259/402B01D2253/102B01D2257/90B01D53/1493B01D53/047B01D2253/108B01D2253/116B01D2253/104B01D2253/106B01D53/72B01D53/82B01D53/73B01D53/78B01D53/8687B01D2255/20707B01D2255/802B01D2258/06B01D2259/804
Inventor HUANG, DUDUWU, YUNXU, SIHAICUI, LEI
Owner ANHUI RESOURCE SAVING & ENVIRONMENTAL TECH CO LTD
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